Ya know, I was thinking that the shutter was a bit quieter and smoother - the release didn't seem to have the crisp fire that it did before. An analogy is a bit like a target rifle's adjustable trigger, the sear and backlash controls how much and the quality of the firing. (many years ago I did long distance shooting - both rifle (7MM Rem. Mag and occasional .223). It seems to have lost some crispness, and perhaps quieter, although I'm not a good one for that given my hearing loss - lots of guns, 3.5' rocket launchers, etc.